Originfacts

Flight route

Flights from Seoul (GMP) to Jeju (CJU)

Distance, flight time and the airlines in Originfacts’ route record for Seoul to Jeju, the two airports, and partner fare tools. Each figure shows where it came from.

IATA code GMPFromSeoulGimpo International Airport, South Korea
451 km~1h 1m est.
IATA code CJUToJejuJeju International Airport, South Korea
In our route record:Jeju AirAir BusanKorean AirJin AirAsiana AirlinesT'way AirEastar Jet
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Route record, updated 21 May 2026Where this comes from

GMP → CJU at a glance

  • Distance

    451 km

    About 280 miles: the great-circle distance between the two airports’ coordinates.

    Route record · checked against coordinates

  • Flight time

    ~1h 1m

    An estimate, not a timetable. The airline’s schedule gives the actual time.

    Route record estimate

  • Time difference

    None

    GMP and CJU are both on UTC+9 today. GMP: Asia/Seoul (UTC+9) · CJU: Asia/Seoul (UTC+9)

    Calculated from IANA time zonesTime zones: Time difference

  • Airlines in route record

    7

    Jeju Air, Air Busan, Korean Air, Jin Air, Asiana Airlines, T'way Air and Eastar Jet

    Originfacts route recordSee airlines: Airlines in route record

  • Return route

    CJU → GMP

    Flights from Jeju back to Seoul.

    Originfacts route recordRelated routes: Return route

Airlines on the GMP–CJU route

Route record · 21 May 2026

The airlines Originfacts’ route record lists for GMP–CJU, after leaving out carriers listed only through a recycled airline code or as a codeshare. It is not a full schedule and does not say which airlines fly nonstop; check current flights with the airline.

Baggage and check-in rules are each airline’s general rules, read from its own site on the date shown. They are not specific to this route, and your fare type can change them: check your booking.

Fare calendar and schedule for GMP → CJU

Partner tools · indicative

Two tools from Aviasales, our flight-search partner. They load only if you allow advertising cookies. Prices in them come from recent searches and are indicative, not quotes; the fare on the booking page can differ. The schedule shows flights in the partner’s data, including codeshares sold by other airlines.

Fare calendar

This price calendar is provided by our partner Travelpayouts (Aviasales) and sets cookies.

Or search on flights.originfacts.com, our partner’s site

Flight schedule

This flight schedule is provided by our partner Travelpayouts (Aviasales) and sets cookies.

Or search on flights.originfacts.com, our partner’s site

The airports: Gimpo International Airport and Jeju International Airport

Airport records · OurAirports · Wikidata

  • Departure

    Gimpo International AirportGMP

    Codes
    GMP · RKSS (IATA · ICAO)
    Serves
    Seoul, South Korea
    Time zone
    Asia/Seoul (UTC+9 today)
    Coordinates
    37.560°, 126.800°
    Size class
    Large airport
    Runways
    2, longest 3,600 m (14L/32R)
    Operator
    Korea Airports Corporation
    Passengers
    24.5 million in 2022

    Size class, runways: OurAirports, 5 Oct 2026. Operator, passengers: Wikidata (opens in a new tab), 5 Oct 2026 (passengers citing airport.co.kr (opens in a new tab)).

    Seoul airport guide

  • Arrival

    Jeju International AirportCJU

    Codes
    CJU · RKPC (IATA · ICAO)
    Serves
    Jeju, South Korea
    Time zone
    Asia/Seoul (UTC+9 today)
    Coordinates
    33.510°, 126.490°
    Size class
    Large airport
    Runways
    2, longest 3,180 m (07/25)
    Operator
    Korea Airports Corporation
    Passengers
    29.7 million in 2022

    Size class, runways: OurAirports, 5 Oct 2026. Operator, passengers: Wikidata (opens in a new tab), 5 Oct 2026 (passengers citing airport.co.kr (opens in a new tab)).

    Jeju airport guide

Each airport guide lists the airport’s codes, location and time zone, any other routes and airlines Originfacts tracks from GMP or CJU, current weather and nearby airports, and where to check terminal and transport details.

Weather in Jeju: average high, low and rain by month

NASA POWER · modelled · 2016–2025

Averages of NASA POWER (opens in a new tab) daily values for 2016–2025 at 33.51°, 126.49° near CJU (MERRA-2 reanalysis grid, about 50 km cells), worked out by Originfacts. Modelled, not weather-station readings or a forecast.

In October, Jeju averages a daily high of 21°C and a low of 19°C, with about 117 mm of rain over the month.

Average daily high and low temperature and average monthly rain near CJU, 2016–2025
MonthHighLowRain
Jan9°C7°C56 mm
Feb10°C7°C69 mm
Mar12°C9°C94 mm
Apr15°C12°C124 mm
May18°C16°C123 mm
Jun22°C20°C198 mm
Jul27°C25°C240 mm
Aug29°C27°C181 mm
Sep26°C24°C218 mm
Octthis month21°C19°C117 mm
Nov16°C14°C64 mm
Dec11°C9°C45 mm

Jeju airport guide

Getting to and from GMP and CJU

Not yet verified

Ground transport, terminals and parking at either airport have not been checked against the airports’ own pages yet, so none are listed here.

Seoul to Jeju: common questions

Which airlines fly from Seoul to Jeju?

Originfacts’ route record for GMP–CJU lists Jeju Air, Air Busan, Korean Air, Jin Air, Asiana Airlines, T'way Air and Eastar Jet. It is not a full schedule; check current flights with the airline before booking.

How far is Seoul from Jeju by air?

About 451 km, the great-circle distance between Gimpo International Airport and Jeju International Airport.

How long is the flight from Seoul (GMP) to Jeju (CJU)?

The Originfacts route record estimates about 1h 1m nonstop. It is an estimate, not a timetable: the airline’s schedule gives the actual flight time.

Is there a time difference between Seoul and Jeju?

No. Both airports are on UTC+9 today (time zones Asia/Seoul and Asia/Seoul).

Sources

Where each part of this page comes from
  • Distance, flight-time estimateOriginfacts route record, checked against the great-circle distance between the airport coordinates21 May 2026
  • AirlinesOriginfacts route record, leaving out carriers listed only through a recycled airline code or as a codeshare21 May 2026
  • Baggage and check-inEach airline’s own pages, via the Originfacts airline fact files; only checked values are shown5 Oct 2026 – 6 Oct 2026
  • Airport codes, time zonesOriginfacts airport records12 Jun 2026
  • Time differenceCalculated from each airport’s IANA time zone, with daylight saving applied for today’s dateToday
  • Airport size class, runwaysOurAirports (opens in a new tab) open data (public domain); the size class is OurAirports’ own, not an official category5 Oct 2026
  • Airport opened, operator, passengersWikidata (CC0), each airport’s own item; passenger figures are the latest year recorded there, with its reference where Wikidata gives one5 Oct 2026
  • Weather in JejuNASA POWER (opens in a new tab) daily data (MERRA-2 reanalysis), averaged by month by Originfacts. Modelled, not weather-station readings2016–2025
  • Fare calendar, scheduleAviasales widgets, loaded with advertising consentLive

Schedules, fares and airline rules change. Confirm with the airline before you travel.